Thanks Elad!
All the source code seems to LGPL though, where did you see the GPL files? Are you talking about ltmain.sh ?
In that case it is just a tool used for building the library and doesn't get included in the binary package. The License: tag is for _binary_ packages so even though there's a GPL tool used for building it, as long as it doesn't end up in the binary package it doesn't affect its License: tag.